The Church received from the apostles the tradition of giving baptism even to infants. The apostles, to whom were committed the secrets of the divine sacraments, knew there are in everyone innate strains of [original] sin, which must be washed away through water and the Spirit
OrigenWhen a house is being built which is to be made as strong as possible, the building takes place in fine weather and in calm, so that nothing may hinder the structure from acquiring the needed solidity.
OrigenFor if the mystery concealed of old is made manifest to the Apostles through the prophetic writings, and if the prophets, being wise men, understood what proceeded from their own mouths, then the prophets knew what was made manifest to the Apostles.
Origen